Anyway, by 1978, television was eager to tap into the phenomenal Star Wars success, and Battlestar Galactica was born. Now, it's true the plot's not exactly the same -- back in 1978, BSG was about a ragtag band of rebels looking for Earth while they fled Cylon robots -- but there are some similarities that are hard to ignore.
The Darth Vader and Cylon designs are strikingly similar. Furthermore, while James Earl Jones voiced Darth Vader, Morgan Freeman was recruited for all the Cylon dialogue. Lastly, that's totally untrue.
Those bad guys sure look similar, and so did many of the space shots. That's probably because John Dykstra, who headed the special effects team for Star Wars, also headed up the BSG team. Then you have two main characters and friends: one is a cavalier space cowboy, and the other is a more pious, boy-next-door recruit. That could apply equally to Han Solo and Luke and to Starbuck and Apollo, respectively. Indeed, as sci-fi legend Isaac Asimov said: "Star Wars was fun and I enjoyed it. But Battlestar Galactica was Star Wars all over again and I couldn't enjoy it without amnesia."
And in 1978, 20th Century Fox agreed and brought an intellectual property suit against Universal Studios claiming it had stolen 34 distinct ideas. Of course, all that was forgotten with the 2004 reboot where people could talk about all the important things in the BSG universe, like how influenced it was by Firefly.